Event: Grand Prix S2

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Opponent Rating Result
David Millington 1627 0 - 1
Chris Ellis 1200 0 - 1
Leo Mills 1000 1 - 0
Alan M Willett 890 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1179 = (4717 + 400 * (2 - 2)) / 4)

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